How do you find friends at a party without texting all night?

You arrive at a packed apartment, three rooms deep, music loud, and your group has scattered. Texting "where are you?" five times rarely works once everyone is mid-conversation. Parages handles the problem quietly. When someone you added drifts within a short distance, your phone tells you. No map of everyone, no live tracking, just a nudge that a friend is close enough to find.